EP2049579B1 - Copolymères du butène-1 - Google Patents

Copolymères du butène-1 Download PDF

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Publication number
EP2049579B1
EP2049579B1 EP07729246A EP07729246A EP2049579B1 EP 2049579 B1 EP2049579 B1 EP 2049579B1 EP 07729246 A EP07729246 A EP 07729246A EP 07729246 A EP07729246 A EP 07729246A EP 2049579 B1 EP2049579 B1 EP 2049579B1
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Prior art keywords
butene
copolymers
mole
propylene
polymer
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EP2049579A1 (fr
Inventor
Giampaolo Pellegatti
Stefano Spataro
Fabrizio Piemontesi
Gianni Vitale
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Basell Poliolefine Italia SRL
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Basell Poliolefine Italia SRL
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/04—Monomers containing three or four carbon atoms
    • C08F210/08—Butenes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/04—Monomers containing three or four carbon atoms
    • C08F210/08—Butenes
    • C08F210/10—Isobutene
    • C08F210/12—Isobutene with conjugated diolefins, e.g. butyl rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms

Definitions

  • the present invention relates to butene-1 copolymers containing up to 27 % by mole of units derived from ethylene and at least propylene and to a process for the preparation of such butene-1 copolymers.
  • butene-1 copolymers are well known in the art and have a wide range of applicability.
  • butene-1 copolymers with a low content of comonomer (1-3% by mol) are generally characterized by good properties in terms of pressure resistance, creep resistance, impact strength and can be used in the manufacture of pipes for replacing the metal pipes.
  • butene-1 copolymers with a higher content of comonomer can be used for example as components of blends with other polyolefins or polymeric products, in order to modify particular properties such as scaling strength, flexibility and softness of the plastic materials.
  • copolymers of butene-1 with another alpha olefin in blends with crystalline copolymers of propylene act as modifiers improving the heat sealing properties of propylene based films for packaging.
  • Such copolymers when obtained by conventional methods (solution polymerization) generally tend to have narrow molecular weight distribution and thus when added in blends with propylene polymers tend to reduce processability.
  • poor random distribution of comonomers in the copolymers obtained with some non conventional processes (gas phase) tend to reduce transparency of the films produced with such copolymers.
  • US patent n. 4943615 discloses butene-1 copolymers containing an alpha olefin comonomer with 2 to 8 carbon atoms.
  • Such copolymers have a molecular weight distribution (MWD) in terms of M w/ M n, measured by GPC analysis, of 4 to 1 and a differential scanning calorimetry (DSC) thermal profile characterized by two endothermic peaks. It is laid open the possibility to use not only a single comonomer, but also combination of comonomers in the preparation ofbutene -1copolymers.
  • the US P atent n. 4726999 discloses random butene-1 copolymers with less than 40 % by mole of propylene as comonomer, to be used in blends with a crystalline random propylene copolymer to produce heat sealable layers in laminated structures.
  • the random butene-1 copolymer may further contain small amounts of another alpha olefin comonomer.
  • the above patent documents remain silent on the effect of the addition of a second comonomer and do not provide any example giving indication of referred amounts of the second comonomer to be added.
  • European Patent EP0135358 discloses butene-1 copolymers with propylene as comonomer where the presence of a second comonomer is indicated as possibly detrimental for the overall desired properties of the material if not present in very small amounts.
  • the present invention provides new butene-1 copolymers having an optimal balance of properties making them suitable for various applications and particularly as modifiers to be added to polypropylene crystalline matrices to improve the heat sealing properties of the blends, in particular to lower the seal initiation temperature (SIT) without affecting the processability of the blends so obtained.
  • SIT seal initiation temperature
  • copolymers is used herein to define polymers containing two or more kinds of comonomers, in particular terpolymers.
  • the thermal behavior of the copolymers of the present invention is characterized by a broad DSC profile in the temperature range between 70 and 110°C.
  • the melting points (Tm) of the two crystalline forms of Polybutene-1 are generally distinguishable only with thermal analysis carried out under specific conditions as describe in the experimental section (using 2 heating runs).
  • the copolymers of the present invention exhibit a very high X ray crystallinity that is generally over 33%, preferably over 35%, and flexural elastic modulus of less than 200 MPa, preferably less than or equal to 195. Low values of flexural modulus, are combined with improved tensile properties particularly elongation at break that is equal to or over 400%, preferably equal to or over 450%.
  • the copolymers of the present invention exhibit values of glass transition temperature below - 10°C, preferably below -12°C, which brings better impact properties at low temperature.
  • copolymers of the present invention act as modifiers when blended in polymeric compositions particularly lowering the seal initiation temperature without lowering the melting temperature of the polymeric matrix and without reducing the overall processability of the composition. This is typically a requirement for the seal layers of films for packaging.
  • the copolymers of the present invention have proved to be particularly advantageous both in bioriented film (particularly bioriented polypropylene film BOPP) and cast film applications and also in blown films.
  • copolymers of the present invention when blended in polymer matrices give soft materials without affecting or sometimes even improving other mechanical properties of the blends. High impact resistance is found at low temperature due to the glass transition behavior of the copolymers of the present invention.
  • a further object of the present invention is a polymer composition comprising:
  • the component (B) comprises an olefin (co)polymer.
  • the component (B) can be selected from ethylene containing (co)polymers, propylene containing (co)polymers and from their mixtures.
  • polymer compositions comprising:
  • said alpha-olefin is butene-1.
  • Said compositions which are particularly useful in applications where a low seal initiation temperature (SIT) is required, show better performances, in terms of SIT and mechanical properties, with respect to the compositions in which butene-1 copolymers of the prior art are used.
  • SIT seal initiation temperature
  • butene-1 copolymers having flexural elastic modulus of less than or equal to 120 MPa.
  • Particularly preferred for this application are the copolymers having an ethylene content of from 2.9 to 7 % by mole, preferably from 2.9 to 5 % by mole, wherein propylene is present in amounts from 7 to 18 % by mole.
  • butene-1 copolymers having flexural elastic modulus of from 120 to 195 MPa.
  • Particularly preferred for this last application are the copolymers having an ethylene content of from 1 to 2.9 % by mole, preferably from 1.5 to 2 % by mole, wherein propylene is present in amounts from 7 to 15 % by mole.
  • copolymers of the invention can be used also in the preparation of polymer compositions to be used in applications requiring a specific range of peel force between two layers that have been previously sealed (Seal-Peel applications).
  • the butene-1 copolymers of the present invention can be prepared by polymerization of the monomers in the presence of a stereospecific Ziegler-Natta catalyst.
  • the process comprises copolymerizing butene-1 with:
  • Magnesium dichloride in active form is preferably used as a support. It is widely known from the patent literature that magnesium dichloride in active form is particularly suited as a support for Ziegler-Natta catalysts. In particular, USP 4,298,718 and USP 4,495,338 were the first to describe the use of these compounds in. Ziegler-Natta catalysis.
  • magnesium dihalides in active form used as support or co-support in components of catalysts for the polymerisation of olefins are characterized by X-ray spectra in which the most intense diffraction line that appears in the spectrum of the non-active halide is diminished in intensity and is replaced by a halo whose maximum intensity is displaced towards lower angles relative to that of the more intense line.
  • the preferred titanium compounds used in the catalyst component of the present invention are TiCl 4 and TiCl 3 ; furthermore, also Ti-haloalcoholates of formula Ti(OR) n-y X y , where n is the valence of titanium, X is halogen, preferably chlorine, and y is a number between 1 and n, can be used.
  • the internal electron-donor compound is preferably selected from esters and more preferably from alkyl, cycloalkyl or aryl esters of monocarboxylic acids, for example benzoic acids, or polycarboxylic acids, for example phthalic or succinic acids, the said alkyl, cycloalkyl or aryl groups having from 1 to 18 carbon atoms.
  • Examples of the said electron-donor compounds are diisobutyl phthalate, diethylphtahalate and dihexylphthalate.
  • the internal electron donor compound is used in molar ratio with respect to the MgCl 2 of from 0.01 to 1 preferably from 0.05 to 0.5.
  • the preparation of the solid catalyst component can be carried out according to several methods.
  • the magnesium dichloride in an anhydrous state and the internal electron donor compound are milled together under conditions in which activation of the magnesium dichloride occurs.
  • the so obtained product can be treated one or more times with an excess of TiCl 4 at a temperature between 80 and 135°C. This treatment is followed by washings with hydrocarbon solvents until chloride ions disappeared.
  • the product obtained by co-milling the magnesium chloride in an anhydrous state, the titanium compound and the internal electron donor compound is treated with halogenated hydrocarbons such as 1,2-dichloroethane, chlorobenzene, dichloromethane etc. The treatment is carried out for a time between 1 and 4 hours and at temperature of from 40°C to the boiling point of the halogenated hydrocarbon.
  • the product obtained is then generally washed with inert hydrocarbon solvents such as hexane.
  • magnesium dichloride is pre-activated according to well known methods and then treated with an excess of TiCl 4 at a temperature of about 80 to 135°C which contains, in solution, an internal electron donor compound.
  • the treatment with TiCl 4 is repeated and the solid is washed with hexane in order to eliminate any non-reacted TiCl 4 .
  • a further method comprises the reaction between magnesium alcoholates or chloroalcoholates (in particular chloroalcoholates prepared according to U.S. 4,220,554 ) and an excess of TiCl 4 comprising the internal electron donor compound in solution at a temperature of about 80 to 120°C.
  • the solid catalyst component can be prepared by reacting a titanium compound of formula Ti(OR) n-y X y , where n is the valence of titanium and y is a number between 1 and n, preferably TiCl 4 , with a magnesium chloride deriving from an adduct of formula MgCl 2 •pROH, where p is a number between 0,1 and 6, preferably from 2 to 3.5, and R is a hydrocarbon radical having 1-18 carbon atoms.
  • the adduct can be suitably prepared in spherical form by mixing alcohol and magnesium chloride in the presence of an inert hydrocarbon immiscible with the adduct, operating under stirring conditions at the melting temperature of the adduct (100-130°C). Then, the emulsion is quickly quenched, thereby causing the solidification of the adduct in form of spherical particles. Examples of spherical adducts prepared according to this procedure are described in USP 4,399,054 and USP 4,469,648 .
  • the so obtained adduct can be directly reacted with the Ti compound or it can be previously subjected to thermal controlled dealcoholation (80-130°C) so as to obtain an adduct in which the number of moles of alcohol is generally lower than 3 preferably between 0,1 and 2,5.
  • the reaction with the Ti compound can be carried out by suspending the adduct (dealcoholated or as such) in cold TiCl 4 (generally 0°C); the mixture is heated up to 80-130°C and kept at this temperature for 0,5-2 hours.
  • the treatment with TiCl 4 can be carried out one or more times.
  • the internal electron donor compound can be added during the treatment with TiCl 4 .
  • the treatment with the electron donor compound can be repeated one or more times.
  • the preparation of catalyst components in spherical form is described for example in European Patent Applications EP-A-395083 , EP-A-553805 , EP-A-553806 , EPA-601525 and WO98/44001 .
  • the solid catalyst components obtained according to the above method show a surface area (by B.E.T. method) generally between 20 and 500 m 2 /g and preferably between 50 and 400 m 2 /g, and a total porosity (by B.E.T. method) higher than 0,2 cm 3 /g preferably between 0,2 and 0,6 cm 3 /g.
  • the porosity (Hg method) due to pores with radius up to 10.000 ⁇ generally ranges from 0.3 to 1.5 cm 3 /g, preferably from 0.45 to 1 cm 3 /g.
  • the alkyl-Al compound (B) is preferably chosen among the trialkyl aluminum compounds such as for example triethylaluminum, triisobutylaluminum, tri-n-butylaluminum, tri-n-hexylaluminum, tri-n-octylaluminum. It is also possible to use mixtures of trialkylaluminum's with alkylaluminum halides, alkylaluminum hydrides or alkylaluminum sesquichlorides such as AlEt 2 Cl and Al 2 Et 3 Cl 3 .
  • the external donors (C) are preferably selected among silicon compounds of formula R a 5 R b 6 Si(OR 7 ) c , where a and b are integer from 0 to 2, c is an integer from 1 to 3 and the sum (a+b+c) is 4; R 5 , R 6 , and R 7 , are alkyl, cycloalkyl or aryl radicals with 1-18 carbon atoms optionally containing heteroatoms.
  • a particularly preferred group of silicon compounds is that in which a is 0, c is 3, b is 1 and R 6 is a branched alkyl or cycloalkyl group, optionally containing heteroatoms, and R 7 is methyl.
  • Examples of such preferred silicon compounds are dicyclopentyldimethoxysilane, cyclohexyltrimethoxysilane, t-butyltrimethoxysilane and thexyltrimethoxysilane.
  • the use of dicyclopentyldimethoxysilane is particularly preferred.
  • the electron donor compound (C) is used in such an amount to give a molar ratio between the organoaluminum compound and said electron donor compound (c) of from 0.1 to 500, preferably from 1 to 300 and more preferably from 3 to 100.
  • pre-polymerize said catalyst in a pre-polymerization step.
  • Said prepolymerization can be carried out in liquid, (slurry or solution) or in the gas-phase, at temperatures generally lower than 100°C, preferably between 20 and 70°C.
  • the pre-polymerization step is carried out with small quantities of monomers for the time which is necessary to obtain the polymer in amounts of between 0.5 and 2000g per g of solid catalyst component, preferably between 5 and 500 and, more preferably, between 10 and 100g per g of solid catalyst component.
  • the polymerization process can be carried out according to known techniques, for example slurry polymerization using as diluent a liquid inert hydrocarbon, or solution polymerization using for example the liquid butene-1 as a reaction medium. Moreover, it may also be possible to carry out the polymerization process in the gas-phase, operating in one or more fluidized or mechanically agitated bed reactors.
  • the polymerization carried out in the liquid butene-1 as a reaction medium is highly preferred
  • the polymerization is generally carried out at temperature of from 20 to 120°C, preferably of from 40 to 90°C.
  • the polymerization can be carried out in one or more reactors that can work under same or different reaction conditions such as concentration of molecular weight regulator, comonomer concentration, temperature, pressure etc.
  • Working in more than one reactor under different conditions has the advantage that the various polymerization step can be properly modulated so as to properly tailoring the properties of the final polymer.
  • copolymers of the invention are suitable for use in many applications and particularly for cast and bioriented films, bioriented polypropilene films (BOPP) and also for blown films.
  • BOPP bioriented polypropilene films
  • 13 C-NMR spectra of the copolymers of the examples were performed on a polymer solution (8-12 % by weight) in dideuterated 1,1,2,2-tetrachloro-ethane at 120 °C.
  • the 13 C NMR spectra were acquired on a Bruker DPX-400 spectrometer operating at 100.61 MHz in the Fourier transform mode at 120 °C using a 90° pulse, 15 seconds of delay between pulses and CPD (WALTZ16) to remove 1 H- 13 C coupling.
  • About 1000 transients were stored in 32K data points using a spectral window of 60 ppm (0-60 ppm).
  • I 1 , I 2 , I 3 , I 5 , I 6 , I 9 , I 6 , I 10 , I 14 , I 15 , I 19 are integrals of the peaks in the 13 C NMR spectrum (peak of EEE sequence at 29.9 ppm as reference).
  • the assignments of these peaks are made according to J.C. Randal, Macromol. Chem Phys., C29, 201 (1989 ), M. Kakugo, Y. Naito, K. Mizunuma and T. Miyatake, Macromolecules, 15, 1150, (1982 ), and H.N. Cheng, Journal of Polymer Science, Polymer Physics Edition, 21, 57 (1983 ). They are collected in Table A (nomenclature according to C.J.
  • Measured according to the method ISO 1183 is based on observing the level to which a test specimen sinks in a liquid column exhibiting a density gradient.
  • Standard specimen are cut from strands extruded from a grader (MFR measurement).
  • the specimen is putted in an autoclave at 2000 bar for 10min at a room temperature in order to accelerate the transformation phase of the polybutene. After this the specimen is inserted in the gradient column where density is measured according to ISO 1183.
  • This property is strictly connected with the molecular weight distribution of the polymer under examination. In particular it is inversely proportional to the creep resistance of the polymer in the molten state. Said resistance called modulus separation at low modulus value (500 Pa), was determined at a temperature of 200°C by using a parallel plates rheometer model RMS-800 marketed by RHEOMETRICS (USA), operating at an oscillation frequency which increases from 0.1 rad/sec to 100 rad/second. From the modulus separation value, one can derive the P.I. by way of the equation:
  • MWD and particularly the ratio M w / M n is determined using a Waters 150-C ALC/GPC system equipped with a TSK column set (type GMHXL-HT) working at 135°C with 1,2-dichlorobenzene as solvent (ODCB) (stabilized with 0.1 vol. of 2, 6-di-t-butyl p-cresole (BHT) ) at flow rate of 1 ml/min.
  • ODCB 1,2-dichlorobenzene as solvent
  • BHT 2, 6-di-t-butyl p-cresole
  • the solution is filtered through a 0.45 ⁇ m Teflon membrane.
  • the filtrate (concentration 0.08-1.2g/l injection volume 300 ⁇ l) is subjected to GPC.
  • Monodisperse fractions of polystyrene (provided by Polymer Laboratories) were used as standard.
  • the diffraction pattern was used to derive all the components necessary for the degree of cristallinity by defining a suitable linear baseline for the whole spectrum and calculating the total area (Ta), expressed in counts/sec ⁇ 2 ⁇ , between the spectrum profile and the baseline;
  • the melting points (Tm) of the polymers of the examples were measured by Differential Scanning Calorimetry (D.S.C.) on a Perkin Elmer DSC-1 calorimeter, previously calibrated against indium and zinc melting points.
  • the two different crystalline forms of polybutene are distinguishable, in a DSC melting thermogram, because they have distinct melting points: Form I melts always at higher temperature than Form II. Moreover, Form II precipitates during the crystallization from the melt while the more stable Form I forms upon annealing at room temperature for a certain amount of time.
  • the data acquisition in continuous heating mode has been carried out as follows:
  • Molded specimen of 76mm by 13mm by 1 mm are fixed to the DMTA machine for tensile stress.
  • the frequency of the tension and relies of the sample is fixed at 1 Hz.
  • the DMTA translate the elastic response of the specimen starting form -100°C to 130°C. In this way it is possible to plot the elastic response versus temperature.
  • 1,9 mm thick plaques are put into an autoclave at 200 bars for 10 min at room temperature in order to accelerate the phase transformation of PB.
  • the catalyst component contained 2.8 % by weight of Ti and 12.3 % by weight of phthalate.
  • the polymerisation was carried out in examples 1-4 after a precontacting step, in a liquid-phase stirred reactor (R1) in which liquid butene-1 constituted the liquid medium.
  • a liquid-phase stirred reactor R1 in which liquid butene-1 constituted the liquid medium.
  • the solid catalyst component, the Al-Alkyl compound TIBAL (i.e. triisobutylaluminum) and the external donor dicyclopentyldimethoxysilane were pre-mixed under the conditions reported in table 1.
  • the catalyst system was then injected into the reactor working under the conditions reported in the same table 1.
  • the polymerization was stopped after 8 Hrs by killing the catalyst and transferring the polymerized mass in the devolatilization step.
  • the polymerisation was a sequential polymerization carried out after a precontacting step, in two liquid-phase stirred reactors (R1, R2) connected in series in which liquid butene-1 constituted the liquid medium.
  • the catalyst system was injected into the first reactor working under the conditions reported in table 1.
  • the polymerization was stopped, as in examples 1-4, by killing the catalyst and transferring the polymerized mass in the devolatilization step.
  • the comonomer distribution was evaluated from the product of reactivity ratios calculated according to the method described above.
  • Polybutene-1 DP 8220M a random copolymer of butene-1 with ethylene produced by Basell Polyolefins (MFR 2.5 g/10 min at 190°C/2.16kg, flexural modulus 140 MPa) was tested as a modifier for comparison.
  • a mechanical blend comprising
  • a BOPP film was obtained from the above blend-composition with a stretching ratio of 7x7 using a TM LONG film stretcher as above described. Then the test for the determination of the SIT was carried out by sealing at various temperatures and testing the seal strength using a standard Instron tensile machine. The SIT is taken as the temperature at a seal strength of 2 N/2 cm. The results are reported in Table 2.

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Abstract

Cette invention concerne des copolymères du butène-1 contenant : a) de 1 à 7 % en moles de motifs dérivés de l'éthylène et b) de 3 à 20 % en moles de motifs dérivés d'une ou plusieurs alpha-oléfines de formule générale H2C=CHR, où R représente un radical méthyle ou un radical alkyle linéaire ou ramifié en C3 à C8. Lesdits copolymères présentent une distribution de poids moléculaires ayant un rapport (I) inférieur ou égal à 4 et un rapport molaire (b)/(a) supérieur ou égal à 2,3.

Claims (9)

  1. Copolymères de butène-1 contenant :
    a) 1 à 7 % en mole d'unités dérivées de l'éthylène, et
    b) 3 à 20 % en mole d'unités dérivées du propylène ;
    lesdits copolymères présentant une distribution des poids moléculaires présentant un rapport Mw lMn inférieur ou égal à 4 et un rapport molaire (b)/(a) supérieur ou égal à 2,3 et présentant : r B ⁢ r y ≤ 1
    Figure imgb0023
     r E ⁢ r X ≤ 1 , 5
    Figure imgb0024
     r P ⁢ r Z ≤ 2 ;
    Figure imgb0025
    rBrY, rErX, rPrZ étant les produits des rapports de réactivité dans les spectres 13C-RMN à 100,61 MHz, dans du 1,1,2,2-tétrachloroéthane dideutéré à 120°C.
  2. Copolymères de butène-1 selon la revendication 1, présentant une cristallinité aux rayons X supérieure à 33% et un module de flexion élastique inférieur à 200 MPa.
  3. Composition de polymères comprenant
    (A) 1 à 99 % en poids d'un copolymère de butène-1 selon la revendication 1 et
    (B) 99% à 1% en poids d'un autre composant polymère ;
    lesdits pourcentages se référant à la somme de (A) et (B).
  4. Composition de polymères selon la revendication 3, le composant (B) comprenant un (co)polymère oléfinique.
  5. Composition de polymères selon la revendication 3, le composant (B) étant un (co)polymère contenant de l'éthylène, un (co)polymère contenant du propylène ou leurs mélanges.
  6. Objets confectionnés obtenus à partir des copolymères de butène-1 ou des compositions selon l'une quelconque des revendications précédentes.
  7. Procédé pour la préparation de copolymères de butène-1 selon la revendication 1 ou 2, comprenant la copolymérisation de butène-1 avec :
    a) 1 à 7 % en mole d'éthylène et
    b) 3 à 20 % en mole de propylène ;
    en présence d'un catalyseur stéréospécifique de Ziegler-Natta comprenant (A) un composant catalytique solide comprenant un composé de Ti et un composé donneur d'électrons choisi parmi les phtalates, supporté sur MgCl2 ; (B) un composé d'alkylaluminium et (C) un composé donneur d'électrons externe de formule Ra 5Rb 6Si(OR7)c, où a et b représentent des entiers de 0 à 2, c représente un entier de 1 à 3 et la somme (a+b+c) vaut 4 ; R5, R6 et R7 représentent des radicaux alkyle, cycloalkyle ou aryle comprenant 1-18 atomes de carbone contenant éventuellement des hétéroatomes.
  8. Procédé selon la revendication 7, le donneur externe étant le dicyclopentyldiméthoxysilane.
  9. Procédé selon la revendication 7 ou 8 réalisé dans du butène-1 liquide.
EP07729246A 2006-08-08 2007-05-17 Copolymères du butène-1 Active EP2049579B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07729246A EP2049579B1 (fr) 2006-08-08 2007-05-17 Copolymères du butène-1

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP06118601 2006-08-08
US84128606P 2006-08-30 2006-08-30
EP07729246A EP2049579B1 (fr) 2006-08-08 2007-05-17 Copolymères du butène-1
PCT/EP2007/054798 WO2008017525A1 (fr) 2006-08-08 2007-05-17 Copolymères du butène-1

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WO2022189270A1 (fr) * 2021-03-09 2022-09-15 Basell Poliolefine Italia S.R.L. Composition de polymères à base de propylène

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JP5377474B2 (ja) 2007-04-27 2013-12-25 バーゼル・ポリオレフィン・イタリア・ソチエタ・ア・レスポンサビリタ・リミタータ ブテン−１ターポリマー及びその製造方法
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US8344086B2 (en) * 2008-04-22 2013-01-01 Basell Poliolefine Italia S.R.L. 1-butene terpolymers
WO2010069775A1 (fr) 2008-12-19 2010-06-24 Basell Poliolefine Italia S.R.L. Fibres de polyoléfines
WO2011061087A1 (fr) 2009-11-17 2011-05-26 Basell Poliolefine Italia S.R.L. Compositions de polyoléfine souple présentant une aptitude à la transformation améliorée
CN106947166A (zh) * 2009-11-24 2017-07-14 巴塞尔聚烯烃意大利有限责任公司 具有改善密封能力的聚烯烃组合物
CN103080211B (zh) * 2010-09-06 2015-06-17 巴塞尔聚烯烃意大利有限责任公司 具有改进的可密封性的聚烯烃组合物
CN104640925B (zh) * 2012-09-14 2018-01-12 三井化学株式会社 1‑丁烯‑α‑烯烃共聚物组合物
CN107922644B (zh) 2015-08-06 2019-05-14 巴塞尔聚烯烃意大利有限公司 包含丙烯-乙烯-1-丁烯三元共聚物的组合物
WO2020127296A1 (fr) * 2018-12-19 2020-06-25 Basell Poliolefine Italia S.R.L. Fibres de polyoléfine
EP4419594A1 (fr) * 2021-10-22 2024-08-28 Basell Poliolefine Italia S.r.l. Composition de polyprolylène à faible température d'amorçage de scellage (sit)

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WO2022189270A1 (fr) * 2021-03-09 2022-09-15 Basell Poliolefine Italia S.R.L. Composition de polymères à base de propylène

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KR20090040309A (ko) 2009-04-23
WO2008017525A1 (fr) 2008-02-14
KR101415084B1 (ko) 2014-07-04
JP5377307B2 (ja) 2013-12-25
EP2049579A1 (fr) 2009-04-22
JP2010500428A (ja) 2010-01-07

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